package com.king.smart.car.mysmartcarapp.manager;

import android.content.Intent;
import android.os.Environment;
import android.os.StatFs;

import java.io.File;

/**
 * Created by xinzhendi-031 on 2016/11/22.
 */
public class SDCardUtil {
    private SDCardUtil() {
        throw new UnsupportedOperationException("cannot be instantiated");
    }

    /**
     * 判断SDCard是否可用
     */
    public static boolean isSDCardEnable() {
        return Environment.getExternalStorageState().equals(
                Environment.MEDIA_MOUNTED);
    }

    /**
     * 获取SD卡路径
     */
    public static String getSDCardPath() {
        return Environment.getExternalStorageDirectory().getAbsolutePath()
                + File.separator;
    }

    public static File createTmpFile(String fileName) {
        File dir = new File(getSDCardPath() + ToolManager.localAppDir);
        if (!dir.exists())
            dir.mkdirs();
        Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
        File f = new File(dir, fileName);
        if (f != null && f.exists())
            f.delete();
        return f;
    }

    /**
     * 获取SD卡的剩余容量 单位byte
     */
    public static long getSDCardAllSize() {
        if (isSDCardEnable()) {
            StatFs stat = new StatFs(getSDCardPath());
            long availableBlocks = (long) stat.getAvailableBlocks() - 4;
            long freeBlocks = stat.getAvailableBlocks();
            return freeBlocks * availableBlocks;
        }
        return 0;
    }

    /**
     * 获取指定路径所在空间的剩余可用容量字节数，单位byte
     */
    public static long getFreeBytes(String filePath) {
        // 如果是sd卡的下的路径，则获取sd卡可用容量
        if (filePath.startsWith(getSDCardPath())) {
            filePath = getSDCardPath();
        } else {// 如果是内部存储的路径，则获取内存存储的可用容量
            filePath = Environment.getDataDirectory().getAbsolutePath();
        }
        StatFs stat = new StatFs(filePath);
        long availableBlocks = (long) stat.getAvailableBlocks() - 4;
        return stat.getBlockSize() * availableBlocks;
    }

    /**
     * 获取系统存储路径
     */
    public static String getRootDirectoryPath() {
        return Environment.getRootDirectory().getAbsolutePath();
    }
}
